Potassium’s atomic number is 19, and its atomic mass is approximately 39. How many neutrons does potassium have?
To find the number of neutrons, subtract the atomic number from the atomic mass:
Number of neutrons = Atomic mass - Atomic number
Number of neutrons = 39 - 19 = 20
Therefore, potassium has 20 neutrons.
To determine the number of neutrons in an atom, you can subtract the atomic number from the atomic mass.
For potassium (K), the atomic number is 19 and the atomic mass is approximately 39.
Neutrons = Atomic mass - Atomic number
Neutrons = 39 - 19
Neutrons = 20
Therefore, potassium has 20 neutrons.